Ответ:\(\sqrt{18\cdot30}\cdot\sqrt{30}=\sqrt{18\cdot30\cdot30}=30\sqrt{18}=90\sqrt2\).\(5\sqrt{11}\cdot2\sqrt2\cdot\sqrt{22}=10\sqrt{11\cdot2\cdot22}=10\sqrt{484}=220\).Ответ: 1) \(90\sqrt2\); 2) 220.